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Day 398: JEE Mains Physics

5 questions. Try each one first, then open its answer.

  1. Question 1

    Units and Measurements. Asked once: 10 Apr 2023 (same type asked 10 times) See all 10 of this type

    1
    A physical quantity PP is given as
    P=a2b3cdP =\frac{a^{2}b^{3}}{c\sqrt{d}}
    The percentage error in the measurement of a, b, c and dd are 1%,2%,3%1\%,2\%,3\% and 4%4\% respectively. The percentage error in the measurement of quantity PP will be

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  2. Question 2

    Alternating Current. Asked once: 25 Jan 2023 (same type asked 10 times) See all 10 of this type

    26
    An LCR series circuit of capacitance 62.5nF62.5nF and resistance of 50Ω50\Omega, is connected to an A.C. source of frequency 2.0kHz2.0kHz. For maximum value of amplitude of current in circuit, the value of inductance is___ mHmH. (Take π2=10\pi^{2}= 10)

  3. Question 3

    Mechanical Properties of Fluids. Asked once: 1 Feb 2023 (same type asked 10 times) See all 10 of this type

    3
    A mercury drop of radius 10−3 m10^{- 3}\text{ }m is broken into 125 equal size droplets. Surface tension of mercury is 0.45Nm−10.45Nm^{- 1}. The gain in surface energy is:

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  4. Question 4

    Electromagnetic Waves. Asked once: 9 Apr 2024 (same type asked 10 times) See all 10 of this type

    95
    The magnetic field in a plane electromagnetic wave is By=(3.5×10−7)sin⁡(1.5×103x+0.5×1011t)TB_{y}=\left( 3.5 \times 10^{- 7} \right)\sin\left( 1.5 \times 10^{3}x + 0.5 \times 10^{11}t \right)T. The corresponding electric field will be

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  5. Question 5

    Wave Optics. Asked once: 1 Feb 2024 (same type asked 10 times) See all 10 of this type

    101
    A microwave of wavelength 2.0 cm2.0\text{ }cm falls normally on a slit of width 4.0 cm4.0\text{ }cm. The angular spread of the central maxima of the diffraction pattern obtained on a screen 1.5 m1.5\text{ }m away from the slit, will be:

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